Congrats!   

  Great pickup!  
 
 

Yep, those were rope hooks to anchor games to the ground/wall should they be in an area of heavy vibration (boat, near train).
I would highly recommend against using Magic Erasers on that cabinet/coin door if possible, the materials are quite delicate.  Start with the softest/most diluted cleaning solution first.
I suspect if you remove that daughter board on the PCB, you'll find a large Namco logo in green.
I kind of suspect flat metric T-molding must be available in Japan, since Namco used it well into the 90s, if it isn't still used now.
Congrats again 

 !
(BTW, I recreated that sticker for the coin door on my Pole Position project!  I can make one up for you.)